移动式防洪墙力学性能试验及施工工艺研究

发布时间：2018-06-01 22:37

本文选题：移动式防洪墙 + 材料性能　；参考：《华北水利水电大学》2017年硕士论文

【摘要】：移动式防洪墙作为一种安装便捷、美观的防洪方式在国外较多应用,但在国内为首次应用,其工作性能、施工工艺在国内研究甚少,因此急需对此开展研究,旨在为实际工程提供理论支撑,为工程施工提供参考。本文通过解析进口移动式防洪墙的产品性能,提炼出相应的性能指标,同时专门设计、建造了移动式防洪墙试验基地,开展移动式防洪墙系统的力学性能试验分析研究和施工工艺研究。具体包括以下内容:1.根据德国、欧洲标准,进口移动式防洪墙的说明书、检测报告,对进口移动式防洪墙各部件的材料性能展开研究,解析进口移动式防洪墙的产品性能,提炼出相应的性能指标屈服强度及抗拉强度。2.在移动式防洪墙安装完成后,分步蓄水至设计标高,测定不同蓄水高度下各部位受力状态。实验结果表明,在蓄水正常后,混凝土基础埋设钢筋计受力均不大,在正常蓄水位1.8m时,最大拉应力为0.87MPa,远小于钢筋抗拉强度,混凝土基础未出现裂缝,结构安全可靠。3.通过立柱锚固试验区,对单独立柱进行静力试验,逐级加载至设计荷载,试验结果表明,立柱及基础的变位及应变正常,立柱及基础外观无裂缝产生,加载过程中立柱应变随荷载变化,均呈现直线分布,处于弹性阶段,可以保证防洪墙正常运行。有限元仿真结果表明,6种工况组合中流速+撞击+溢流三种荷载组合螺栓承受的总剪力最大,挡板跨中挠度最大,为最危险工况,可根据此工况基础受力进行配筋。4.通过不锈钢预埋件、铝合金相关规范引读,结合工程施工现场情况,提出预埋件安装的两种方法:1)预留槽孔安装法,2)直接安装法。在试验基地对两种安装方法进行试验,结果表明:第一种方法能够在预埋件不能按期进场的情况下,满足形象进度及工期要求,第二种方法适用于预埋件按时进场,与基础钢筋混凝土通过钢筋提前固定,整体浇筑效果好。在试验基地建成后,对移动式防洪墙系统的立柱挡板进行实地的安装测试,结果表明这种型式的防洪墙安装方便,效率高。
[Abstract]:As a convenient and beautiful flood control method, mobile flood control wall is widely used in foreign countries, but it is the first application in China. The research on its working performance and construction technology is very few in China, so it is urgent to carry out research on it. The aim is to provide theoretical support for practical engineering and provide reference for engineering construction. In this paper, by analyzing the product performance of imported movable flood control wall, the corresponding performance indexes are refined, and the test base of mobile flood control wall is designed and built. The mechanical performance test and construction technology of mobile flood control wall system are studied. This includes the following: 1. According to the German and European standards, the specifications and testing reports of imported mobile flood control walls, the material properties of various components of imported mobile flood control walls are studied, and the product performance of imported mobile flood control walls is analyzed. The yield strength and tensile strength. 2. After the installation of the movable flood control wall, the loading state of each part under different storage height was measured by step to the design elevation. The experimental results show that after the water storage is normal, the stress of the reinforced gauge embedded in the concrete foundation is not large, and the maximum tensile stress is 0.87 MPa when the normal storage water level is 1.8 m, which is far less than the tensile strength of the steel bar, and there is no crack in the concrete foundation, and the structure is safe and reliable. The static test of single column is carried out in the anchor test area, and the load is loaded to the design load step by step. The test results show that the displacement and strain of the column and foundation are normal, and there are no cracks in the appearance of the column and foundation. In the loading process, the strain of the columns varies with the load, and all of them are linear distribution, and they are in the elastic stage, which can ensure the normal operation of the flood control wall. The finite element simulation results show that the combined bolt bearing the maximum total shear force and the maximum midspan deflection of the baffle is the most dangerous condition, and the reinforcement. 4 can be carried out according to the stress on the basis of the working condition. Through the introduction of relevant codes for stainless steel embedded parts and aluminum alloys, and combined with the construction site, two methods of installation of the embedded parts are put forward: one is the reserved slot installation method and the other is the direct installation method. The results show that the first method can meet the requirements of image schedule and time limit when the embedded parts can not come into the field on time. The second method is suitable for the embedded parts to enter the field on time. With the foundation reinforced concrete fixed in advance through the reinforcement, the overall pouring effect is good. After the construction of the test base, the installation test of the vertical column baffle of the mobile flood control wall system is carried out. The results show that this type of flood control wall is easy to install and high efficiency.
【学位授予单位】：华北水利水电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV32;TV52

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